With the Renaissance, trade and exploration became prevalent. This caused many European nations to try and conquer lands that were then uncharted, leading to the displacement and enslavement of many indigenous populations.
The answer in this question is Southern and central China. In the year nineteenth century in China and East Asia it was mainly in Southern and central China. On the graphic that is included in the question the British sphere of influence in the 19th century in East Asia and China was mainly in southern and central China.
